CN102841432A - Image pickup optical system - Google Patents

Image pickup optical system Download PDF

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Publication number
CN102841432A
CN102841432A CN2011103409420A CN201110340942A CN102841432A CN 102841432 A CN102841432 A CN 102841432A CN 2011103409420 A CN2011103409420 A CN 2011103409420A CN 201110340942 A CN201110340942 A CN 201110340942A CN 102841432 A CN102841432 A CN 102841432A
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China
Prior art keywords
lens
side optical
image pickup
optical surface
optical system
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Granted
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CN2011103409420A
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Chinese (zh)
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CN102841432B (en
Inventor
黄歆璇
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Largan Precision Co Ltd
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Largan Precision Co Ltd
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Priority to CN201410355210.2A priority Critical patent/CN104101984B/en
Priority to CN201410355260.0A priority patent/CN104076487B/en
Priority to CN201410355774.6A priority patent/CN104111516B/en
Priority to CN201410355434.3A priority patent/CN104076488B/en
Publication of CN102841432A publication Critical patent/CN102841432A/en
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Publication of CN102841432B publication Critical patent/CN102841432B/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/04—Simple or compound lenses with non-spherical faces with continuous faces that are rotationally symmetrical but deviate from a true sphere, e.g. so called "aspheric" lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/62—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having six components only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
    • H04N23/13—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths with multiple sensors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/70—SSIS architectures; Circuits associated therewith
    • H04N25/71—Charge-coupled device [CCD] sensors; Charge-transfer registers specially adapted for CCD sensors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/70—SSIS architectures; Circuits associated therewith
    • H04N25/76—Addressed sensors, e.g. MOS or CMOS sensors

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Lenses (AREA)

Abstract

An optical system for image pickup, comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with refractive power; a third lens element with refractive power; a fourth lens element with refractive power; a fifth lens element with refractive power; the sixth lens element with refractive power is made of plastic, and has a concave image-side surface, wherein both sides of the image-side surface are aspheric and the image-side surface has at least one inflection point; the image pickup optical system satisfies a specific condition. Therefore, the invention not only has good aberration correction, but also can reduce the total length of the image pickup optical system, so as to be applied to the use requirements of good shooting purposes of cameras, mobile phone cameras and the like.

Description

The image pickup optical system
Technical field
The present invention relates to a kind of image pickup optical system; Particularly relate to a kind of and image pickup optical system that image quality good short, to be applied on the electronic product by the total length that six-element lens constituted.
Background technology
On digital camera (Digital Still Camera), mobile phone camera lens miniaturized electronicss such as (Mobile Phone Camera), often be equiped with the image pickup optical system; In order to object is made a video recording; And image pickup optical system main development tendency is towards miniaturization, low cost; But also hope to reach to have good aberration capability for correcting simultaneously, have the image pickup optical system of high resolving power, high imaging quality.
In the image pickup optical system of small-sized electronic product; The known different designs that has more than two eyeglass formulas, prismatic glasses formula, four eyeglass formulas, five eyeglass formulas and the six eyeglass formulas; Yet consider from image quality, four eyeglass formulas, five eyeglass formulas and six eyeglass formula image pickup optical systems on aberration correction, optical transfer function MTF (Modulation Transfer Function) performance than the tool advantage; Wherein, higher with six eyeglass formulas again than the resolution of five eyeglass formulas and four eyeglass formulas, be applicable to the electronic product that high-quality, high picture element (pixel) require.
In the image pickup design of Optical System of six eyeglass formula fixed focal lengths of various miniaturizations, known technology is with different plus or minus diopter combinations; Like US publication US5,682,269, US5,513,046th, adopt one group of lens that coincide, like U.S. Pat 7,564,634 is to use first lens of negative refracting power and second lens of positive refracting power to arrange in pairs or groups each other, to shorten the total length of optical system.
In products such as small-sized digital camera, network cameras, mobile phone camera lens, its image pickup optical system requires miniaturization mostly, focal length is short, the aberration adjustment is good.Wherein, in the fixed focal length image pickup optical system of six eyeglass formulas, for the amplitude that increases the visual angle to shorten total length, often adopt the 6th lens of positive refracting power; Like U.S. Pat 7,701,649, US4; 389,099, US4,550; 987 etc., trending towards good aberration correction, but the still difficult use that meets miniaturized electronics of the total length of image pickup optical system.In addition, for avoiding the strong aberration that positive refracting power caused, like U.S. Pat 3,997,248 the 6th lens configuration that adopt the 5th lens with the positive refracting power of negative refracting power are used the refracting power and the back focal length of allocating the image pickup optical system.These known designs must increase the back focal length of image pickup optical system, so that be difficult to shorten the total length of image pickup optical system.
For this reason, the present invention proposes the more design of practicality, utilizes the combination of refracting power, convex surface and the concave surface of six lens, can shorten the image pickup optical system.Wherein, The 5th lens and the 6th lens have positive refracting power and negative refracting power respectively; So the combination of complementation can have the effect of looking in the distance, and helps shortening back Jiao, more can effectively shorten outside the total length of image pickup optical system; Further can improve image quality, to be applied on the small-sized electronic product.
Summary of the invention
Fundamental purpose of the present invention provides a kind of image pickup optical system, and it is arranged along optical axis to comprising successively as side by the thing side: first lens, second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens; Wherein, first lens have positive refracting power, and its thing side optical surface is a convex surface; Second lens have refracting power; The 3rd lens have refracting power; The 4th lens have refracting power; The 5th lens have refracting power; Have the 6th lens of refracting power, made by plastic material, it is a concave surface as the side optical surface, its thing side optical surface be all aspheric surface as the side optical surface, and it is provided with at least one point of inflexion as the side optical surface; The image pickup optical system satisfies the following relationship formula:
1.8＜|f/f 5|+|f/f 6|＜3.5 (1)
Wherein, f is the focal length of image pickup optical system, f 5Be the focal length of the 5th lens, f 6It is the focal length of the 6th lens.
On the other hand, the present invention provides a kind of image pickup optical system, and as previously mentioned, to can be plastic material made at least three pieces of lens in the image pickup optical system; Can comprise aperture and be arranged at the image sensing component on the imaging surface in addition, form images for object; Wherein, second lens can have negative refracting power, and it can be concave surface as the side optical surface; The 5th lens can have positive refracting power; The 6th lens can have negative refracting power, and its thing side optical surface can be concave surface; Except that satisfying formula (1), also further satisfy one of following relationship formula or its combination:
0.7＜S D/T D＜1.2 (2)
0.2＜(CT 3+CT 4+CT 5)/f＜0.4 (3)
TTL/ImgH＜2.1 (4)
0＜(R 7-R 8)/(R 7+R 8)＜0.6 (5)
0＜(R 3+R 4)/(R 3-R 4)＜1.5 (6)
Further,
2.0＜|f/f 5|+|f/f 6|＜3.2 (7)
Wherein, S DBe the distance of picture side optical surface on optical axis of aperture to the six lens, T DBe the distance of picture side optical surface on optical axis of thing side optical surface to the six lens of first lens, CT 3Be the thickness of the 3rd lens on optical axis, CT 4Be the thickness of the 4th lens on optical axis, CT 5Be the thickness of the 5th lens on optical axis, TTL is the distance of thing side optical surface to imaging surface on optical axis of first lens, and ImgH is the half the of the effective sensing region of image sensing component diagonal angle line length, R 3Be the radius-of-curvature of thing side optical surface on paraxial of second lens, R 4Be the radius-of-curvature of picture side optical surface on paraxial of second lens, R 7Be the radius-of-curvature of thing side optical surface on paraxial of the 4th lens, R 8Be the radius-of-curvature of picture side optical surface on paraxial of the 4th lens, f is the focal length of image pickup optical system, f 5Be the focal length of the 5th lens, f 6It is the focal length of the 6th lens.
On the one hand, the present invention provides a kind of image pickup optical system again, and as previously mentioned, wherein, second lens can have negative refracting power, and it can be concave surface as the side optical surface; The 5th lens can have positive refracting power; The 6th lens can have negative refracting power, and its thing side optical surface can be concave surface; Except that satisfying formula (1), also further satisfy one of following relationship formula or its combination:
0.1＜Y C/f＜0.8 (12)
0.2＜R 12/f＜1.2 (13)
0.03＜T 12/T 23＜0.3 (14)
Wherein, Y CBe the point of contact that is described below and the vertical range of optical axis, said point of contact be the 6th lens (do not see also Fig. 7) as not being positioned on the optical axis on the side optical surface perpendicular to the point of contact of the tangent line of optical axis and said point of contact, f is the focal length of image pickup optical system, R 12Be the radius-of-curvature of picture side optical surface on paraxial of the 6th lens, T 12Be the distance of thing side optical surface on optical axis of picture side optical surface to the second lens of first lens, T 23Be the distance of thing side optical surface on optical axis of picture side optical surface to the three lens of second lens.
Another aspect, the present invention provides a kind of image pickup optical system, as previously mentioned, can comprise the image sensing component that is arranged on the imaging surface in addition, forms images for object; Wherein, second lens can have negative refracting power, and it can be concave surface as the side optical surface; The thing side optical surface of the 4th lens can be concave surface, can be convex surface as the side optical surface; The thing side optical surface of the 5th lens can be concave surface, can be convex surface as the side optical surface; The 6th lens can have negative refracting power, and its thing side optical surface can be concave surface; Except that satisfying formula (1), also further satisfy one of following relationship formula or its combination:
1.0＜f/f 1＜2.0 (8)
25＜v 1-v 2＜40 (9)
-0.2＜(R 11+R 12)/(R 11-R 12)＜0.9 (10)
3.7mm＜TTL＜6.5mm (11)
TTL/ImgH＜2.1 (4)
Wherein, f is the focal length of image pickup optical system, f 1Be the focal length of first lens, v 1Be the abbe number of first lens, v 2Be the abbe number of second lens, R 11Be the radius-of-curvature of thing side optical surface on paraxial of the 6th lens, R 12Be the radius-of-curvature of picture side optical surface on paraxial of the 6th lens, TTL is the distance of thing side optical surface to imaging surface on optical axis of first lens, and ImgH is the half the of the effective sensing region of image sensing component diagonal angle line length.
Another fundamental purpose of the present invention provides a kind of image pickup optical system, and it is arranged along optical axis to comprising in regular turn as side by the thing side: first lens, second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens; Wherein, first lens have positive refracting power, and its thing side optical surface is a convex surface; Second lens have refracting power; The 3rd lens have refracting power; The 4th lens have refracting power; The 5th lens have refracting power; Have the 6th lens of refracting power, made by plastic material, it is a concave surface as the side optical surface, its thing side optical surface be all aspheric surface as the side optical surface, and it is provided with at least one point of inflexion as the side optical surface; The image pickup optical system also satisfies the following relationship formula:
1.8＜|f/f 5|+|f/f 6|＜3.5 (1)
0.1＜Y C/f＜0.8 (12)
Wherein, f is the focal length of image pickup optical system, f 5Be the focal length of the 5th lens, f 6Be the focal length of the 6th lens, Y CBe the point of contact that is described below and the vertical range of optical axis, tangent line and said point of contact perpendicular to optical axis as on the side optical surface that said point of contact belongs to the 6th lens are not positioned on the optical axis.
On the other hand, the present invention provides a kind of image pickup optical system, as previously mentioned, can comprise imaging surface in addition; Wherein, second lens can be concave surface as the side optical surface; The thing side optical surface of the 4th lens can be concave surface, can be convex surface as the side optical surface; The thing side optical surface of the 5th lens can be concave surface, can be convex surface as the side optical surface; The thing side optical surface of the 6th lens can be concave surface; Except that satisfying formula (1) and formula (12), also further satisfy the following relationship formula:
3.7mm＜TTL＜6.5mm (11)
TTL is the distance of thing side optical surface to imaging surface on optical axis of first lens.
The present invention is by above-mentioned first lens, second lens, the 3rd lens, the 4th lens, the 5th lens and the 6th lens; On optical axis with suitable spacing combining and configuring; Can under bigger visual angle, field, have good aberration correction and optical transfer function MTF (Modulation TransferFunction) with advantage.
In the image pickup optical system of the present invention; First lens have positive refracting power; Provide system required most of refracting power, help to shorten the total length of image pickup optical system, second lens have negative refracting power; Can do the Petzval and the number (Petzval Sum) of revisal, update the system effectively to the aberration that lens produced, make peripheral image planes become more flat with positive refracting power.When second lens be concave surface as the side optical surface time, can suitably adjust the negative refracting power intensity of second lens according to face shape, for the update the system aberration good effects is arranged.Moreover; Thing side optical surface is concave surface and is that crescent the 4th lens and the 5th lens of convex surface can help to revise astigmatism as the side optical surface; And if the curvature of the ratio of curvature center of the peripheral position of picture side is big; Help the compact system marginal ray and be incident in the angle on the photosensory assembly, help to promote the sensitivity of the sensitization of image sensing component; By the positive refracting power of the 5th lens with have the complementary configured of the 6th lens of negative refracting power, can produce the effect of looking in the distance, also help shortening back focal length to reduce length overall.
In the image pickup optical system of the present invention again; The configuration of aperture; Can make the outgoing pupil (exit pupil) of image pickup optical system produce long distance with imaging surface; Image can adopt the mode of direct incident to be received by image sensing component, except that avoiding the generation of dark angle, so is the heart far away (telecentric) effect of picture side; The brightness that heart effect usually far away can improve imaging surface can increase the CCD of image sensing component or the efficient that CMOS receives image.
In the image pickup optical system of the present invention; Second lens and the 3rd lens of plus or minus refracting power and the combination of the 4th lens of first lens of positive refracting power, negative refracting power; And the 5th lens of positive refracting power and the 6th lens of negative refracting power compensate mutually; Can effectively reduce the total length of image pickup optical system, make the scope that under identical total length, can obtain the valid pixel of bigger image sensing component; Or in other words,, can design short image pickup optical system in the scope of identical image sensing component valid pixel.
If be provided with the point of inflexion at the 6th lens, can guide the angle of the image light that penetrates the 6th rims of the lens, make the angle of the image light that leaves the axle visual field guide to image sensing component, receive by image sensing component.Moreover comprising at least three pieces of lens by the image pickup optical system, to can be plastic material made, helps making and reducing cost.
Description of drawings
Figure 1A is the synoptic diagram of the image pickup optical system of first embodiment of the invention;
Figure 1B is the aberration curve figure of first embodiment of the invention;
Fig. 2 A is the synoptic diagram of the image pickup optical system of second embodiment of the invention;
Fig. 2 B is the aberration curve figure of second embodiment of the invention;
Fig. 3 A is the synoptic diagram of the image pickup optical system of third embodiment of the invention;
Fig. 3 B is the aberration curve figure of third embodiment of the invention;
Fig. 4 A is the synoptic diagram of the image pickup optical system of fourth embodiment of the invention;
Fig. 4 B is the aberration curve figure of fourth embodiment of the invention;
Fig. 5 A is the synoptic diagram of the image pickup optical system of fifth embodiment of the invention;
Fig. 5 B is the aberration curve figure of fifth embodiment of the invention;
Fig. 6 A is the image pickup optical system synoptic diagram of sixth embodiment of the invention;
Fig. 6 B is the aberration curve figure of sixth embodiment of the invention; And
Fig. 7 is Y of the present invention CSynoptic diagram.
[primary clustering symbol description]
100,200,300,400,500,600: aperture
110,210,310,410,510,610: the first lens
111,211,311,411,511, the thing side optical surface of 611: the first lens
112,212,312,412,512, the picture side optical surface of 612: the first lens
120,220,320,420,520,620: the second lens
121,221,321,421,521, the thing side optical surface of 621: the second lens
122,222,322,422,522, the picture side optical surface of 622: the second lens
130,230,330,430,530,630: the three lens
131,231,331,431,531, the thing side optical surface of 631: the three lens
132,232,332,432,532, the picture side optical surface of 632: the three lens
140,240,340,440,540,640: the four lens
141,241,341,441,541, the thing side optical surface of 641: the four lens
142,242,342,442,542, the picture side optical surface of 642: the four lens
150,250,350,450,550,650: the five lens
151,251,351,451,551, the thing side optical surface of 651: the five lens
152,252,352,452,552, the picture side optical surface of 652: the five lens
160,260,360,460,560,660: the six lens
161,261,361,461,561, the thing side optical surface of 661: the six lens
162,262,362,462,562, the picture side optical surface of 662: the six lens
170,270,370,470,570,670: infrared ray filtering optical filter
180,280,380,480,580,680: imaging surface
190,290,390,490,590,690: image sensing component
F: the focal length of image pickup optical system
f 1: the focal length of first lens
f 5: the focal length of the 5th lens
f 6: the focal length of the 6th lens
CT 3: the thickness of the 3rd lens on optical axis
CT 4: the thickness of the 4th lens on optical axis
CT 5: the thickness of the 5th lens on optical axis
R 3: the radius-of-curvature of the thing side optical surface of second lens on paraxial
R 4: the radius-of-curvature of the picture side optical surface of second lens on paraxial
R 7: the radius-of-curvature of the thing side optical surface of the 4th lens on paraxial
R 8: the radius-of-curvature of the picture side optical surface of the 4th lens on paraxial
R 11: the radius-of-curvature of the thing side optical surface of the 6th lens on paraxial
R 12: the radius-of-curvature of the picture side optical surface of the 6th lens on paraxial
T 12: the distance of thing side optical surface on optical axis of picture side optical surface to the second lens of first lens
T 23: the distance of thing side optical surface on optical axis of picture side optical surface to the three lens of second lens
v 1: the abbe number of first lens
v 2: the abbe number of second lens
Y C: it is the point of contact that is described below and the vertical range of optical axis, and said point of contact is that the point of contact and the said point of contact perpendicular to the tangent line of optical axis as on the side optical surface of the 6th lens is not positioned on the optical axis
S D: by the distance of picture side optical surface on optical axis of aperture to the six lens
T D: by the distance of picture side optical surface on optical axis of thing side optical surface to the six lens of first lens
TTL: the distance of thing side optical surface to imaging surface on optical axis of first lens
ImgH: half of the effective sensing region of image sensing component diagonal angle line length
Fno: f-number
HFOV: half of maximum field visual angle
Embodiment
The present invention provides a kind of image pickup optical system; See also Figure 1A, it arranges the image pickup optical system by the thing side to comprising in regular turn as side along optical axis: first lens 110, second lens 120, the 3rd lens 130, the 4th lens 140, the 5th lens 150 and the 6th lens 160; Wherein, first lens 110 have positive refracting power, and its thing side optical surface 111 is a convex surface; Second lens 120 have refracting power; The 3rd lens 130 have refracting power; The 4th lens 140 have refracting power; The 5th lens 150 have refracting power; Have the 6th lens 160 of refracting power, made by plastic material, it is a concave surface as side optical surface 162, its thing side optical surface 161 be all aspheric surface as side optical surface 162, and it is provided with at least one point of inflexion as side optical surface 162.The image pickup optical system comprises aperture 100 and infrared ray filtering optical filter 170 in addition, and aperture 100 is arranged between first lens 110 and second lens 120, is mid-aperture; Infrared ray filtering optical filter 170 is arranged between the 6th lens 160 and the imaging surface 180, is generally the planar optics material and processes, and does not influence the focal length of image pickup optical system of the present invention.The image pickup optical system also comprises image sensing component 190, and it is arranged on the imaging surface 180, can object be formed images.The equation (Aspherical Surface Formula) of the aspherics face of first lens 110, second lens 120, the 3rd lens 130, the 4th lens 140, the 5th lens 150 and the 6th lens 160 is constituted by formula (15),
X ( Y ) = ( Y 2 / R ) 1 + ( 1 - ( 1 + K ) ( Y / R ) 2 ) + Σ i ( A i ) · ( Y ′ ) - - - ( 15 )
Wherein,
X: be the point of Y apart from optical axis on the aspheric surface, itself and the relative height that is tangential on the tangent plane on the summit on the aspheric surface optical axis;
Y: the point on the aspheric curve and the distance of optical axis;
R: radius-of-curvature;
K: conical surface coefficient; And
A i: i rank asphericity coefficient.
In image pickup optical system of the present invention; The optical surface of first lens 110, second lens 120, the 3rd lens 130, the 4th lens 140 and the 5th lens 150 can be provided with sphere or aspheric surface; If use aspheric optical surface, then can change its refracting power, in order to subdue aberration by the radius-of-curvature of optical surface; And then reduce the number that image pickup optical system lens use, can effectively reduce the total length of image pickup optical system.The material of lens can be glass or plastics, if the material of lens is a glass, can increase the degree of freedom of image pickup optical system refracting power configuration, if the lens material is plastics, can effectively reduce production costs.Thus, image pickup optical system of the present invention satisfies relational expression: formula (1) by aforesaid first lens 110, second lens 120, the 3rd lens 130, the 4th lens 140, the 5th lens 150 and 160 configurations of the 6th lens.
In the image pickup optical system of the present invention, main positive refracting power is provided by first lens 110 and 150 on the 5th lens, when satisfying formula (1), promptly limits the focal distance f of the 5th lens 150 5, the 6th lens 160 focal distance f 6And the ratio between the focal distance f of image pickup optical system can effectively distribute in the image pickup optical system the required refracting power of the 5th lens 150, can reduce system for the susceptibility of the error suitably positive refracting power required with system is provided.Simultaneously, the refracting power of the 6th lens 160 that adjustment is suitable can be complementary with the refracting power of the 5th lens 150, produces heart characteristic far away and can help shortening back Jiao to reduce length overall, to reach the purpose of image pickup optical system miniaturization.
Focal distance f when restriction first lens 110 1During with the ratio (formula (8)) of the focal distance f of image pickup optical system, be the suitable positive refracting power of allotment first lens 110, but and then the Adjustment System focal length, with suitable shortening length overall.When satisfying formula (13), because the picture side optical surface 162 of the 6th lens 160 is a concave surface, the principal point that can make system helps shortening the optics total length of system away from imaging surface 180, to promote the miniaturization of camera lens.
When satisfying formula (4), can effectively reduce the total length of image pickup optical system, make the scope that under identical total length, can obtain bigger image sensing component valid pixel.Likewise, when satisfying formula (2), can be by the distance of suitable aperture position of allotment and first lens, 110 to the 6th lens 160, to shorten the length of image pickup optical system.When the value (formula (11)) of restriction image pickup optical system total length, can make system that suitable length overall is arranged, if length overall is too short, then the thickness of each lens need be designed to thinlyyer, makes that the lens manufacture qualified rate is on the low side, and also possibly make the assembling difficulty that becomes.
Moreover; When satisfying formula (3), under the focal distance f of the image pickup optical system of unit length, can suitably adjust the thickness of the 3rd lens 130, the 4th lens 140 and the 5th lens 150; Help reducing the total length of image pickup optical system, and the yield that helps on the processing procedure promotes.When the thing side optical surface 121 of picture side optical surface 112 to second lens 120 of restriction first lens 110 on optical axis apart from T 12And 131 of the thing side optical surfaces of the picture side optical surface 122 of second lens 120 and the 3rd lens 130 on optical axis apart from T 23Ratio (formula (14)), can make light pass through first lens 110 is suitable angle with the refraction angle that the clearance gets into the 3rd lens 130, to reduce total length.
Radius of curvature R when the thing side optical surface 161 that limits the 6th lens 160 11Radius of curvature R with picture side optical surface 162 12The time (formula (10)), can limit the face deformationization of the 6th lens 160, remove and help the revisal of system aberration, and help allocating the refracting power of the 6th lens 160, with complementary, form the configuration of looking in the distance with the positive refracting power of the 5th lens 150.Moreover; The picture side optical surface 142 of the 4th lens 140 is a convex surface, when limiting the ratio (formula (5)) of its thing side optical surface 141 and the radius-of-curvature of picture side optical surface 142, helps to allocate the 4th lens 140 and makes it have suitable refracting power; Can reduce the susceptibility of system for error; Can be beneficial to manufacturing, with raising yield and saving production cost, and thing side optical surface 141 is concave surface and the function that has the correction astigmatism as side optical surface 142 for crescent the 4th lens 140 of convex surface; Same, when satisfying formula (6), promptly limit the face deformationization of second lens 120, can help having the correction aberration function of second lens 120 of negative refracting power.
When satisfying formula (9), make abbe number (Abbe number) v of first lens 110 1Abbe number (Abbe number) v with second lens 120 2Difference in proper range, can effectively revise the aberration that first lens 110 and second lens 120 produce, and can increase the Chromatically compensated ability of second lens 120; As the point of contact described in bracket of restriction the 6th lens 160 and the vertical range Y of optical axis CDuring with the ratio (formula (12)) of the focal distance f of image pickup optical system (said point of contact is that the point of contact and the said point of contact perpendicular to the tangent line of optical axis as on the side optical surface 162 of the 6th lens 160 is not positioned on the optical axis); Can make the 6th lens 160 relatively large in the scope of paraxial negative refracting power; Can strengthen the aberration correction at paraxial place; And adjust the back focal length of suitable image pickup optical system, help shortening system's length overall.
Image pickup optical system of the present invention will specify by following specific embodiment conjunction with figs..
< first embodiment >
The image pickup optical system synoptic diagram of first embodiment of the invention sees also Figure 1A, and the aberration curve of first embodiment sees also 1B figure.The image pickup optical system of first embodiment mainly is made up of six-element lens, aperture 100 and infrared ray filtering optical filter 170; On optical axis; Extremely comprise in regular turn by the thing side: first lens 110 with positive refracting power as side; Made for plastic material, its thing side optical surface 111 is a convex surface, it is convex surface as side optical surface 112, its thing side optical surface 111 and be all aspheric surface as side optical surface 112; Aperture 100; Second lens 120 with negative refracting power, made for plastic material, its thing side optical surface 121 is a concave surface, it is concave surface as side optical surface 122, its thing side optical surface 121 and be all aspheric surface as side optical surface 122; The 3rd lens 130 with negative refracting power, made for plastic material, its thing side optical surface 131 is a concave surface, it is concave surface as side optical surface 132, its thing side optical surface 131 be all aspheric surface as side optical surface 132; The 4th lens 140 with positive refracting power, for plastic material is processed, its thing side optical surface 141 is a concave surface, it is convex surface as side optical surface 142, its thing side optical surface 141 be all aspheric surface as side optical surface 142; The 5th lens 150 with positive refracting power, made for plastic material, its thing side optical surface 151 is a concave surface, it is convex surface as side optical surface 152, its thing side optical surface 151 be all aspheric surface as side optical surface 152; The 6th lens 160 with negative refracting power; For plastic material made; Its thing side optical surface 161 is a concave surface, it is concave surface as side optical surface 162, its thing side optical surface 161 be all aspheric surface as side optical surface 162, and it is provided with at least one point of inflexion as side optical surface 162; Infrared ray filtering optical filter (IR-filter) that glass material is processed 170 is sheet glass, can pass through the wavelength section in order to the light that is adjusted to picture; And be arranged at the image sensing component 190 on the imaging surface 180; Via the combination of six-element lens, aperture 100 and infrared ray filtering optical filter 170, object is formed images on image sensing component 190.
The optical data of table one, present embodiment
Figure BSA00000603761500111
The optical data of present embodiment is as above shown in the table one, wherein, the thing side optical surface of first lens, 110 to the 6th lens 160 with all use the aspheric surface equation of formula (15) to constitute as the side optical surface, its asphericity coefficient is shown in following table two:
The asphericity coefficient of table two, present embodiment
Optical surface 1 2 4 5 6 7
k＝ -6.27005E+00 2.40641E+01 3.46380E+01 -2.88534E+01 -1.00000E+00 -5.00000E+01
A4＝ 2.22067E-01 -8.91882E-03 1.11985E-02 -5.37315E-03 -3.07329E-01 -1.89409E-01
A6＝ -2.08448E-01 4.56934E-02 4.37210E-02 6.53337E-02 -1.28671E-01 -4.07177E-02
A8＝ 2.21344E-01 -2.30625E-01 2.77223E-01 1.29841E-01 3.77004E-01 1.31926E-01
A10＝ -1.83460E-01 4.05257E-01 -9.77124E-01 -3.51259E-01 -4.49629E-01 -6.72614E-02
A12＝ -1.77376E-03 -5.65290E-01 1.42246E+00 4.58371E-01 3.49487E-01 2.99300E-02
A14＝ -2.07420E-02 3.20599E-01 -6.98996E-01 -1.14116E-01
Optical surface 8 9 10 11 12 13
k＝ 3.45410E+00 -6.84920E-01 9.45035E-01 -4.86064E+00 -4.38056E+00 -1.00945E+01
A4＝ 5.69545E-02 1.13192E-02 8.60026E-03 -1.17314E-01 -1.05554E-02 -5.91758E-02
A6＝ 8.04410E-02 1.69639E-02 -5.77304E-03 1.53311E-01 -2.53017E-02 1.89675E-02
A8＝ -2.04985E-01 9.48472E-03 -1.63354E-03 -1.37395E-01 1.24249E-02 -7.02892E-03
A10＝ 2.92427E-01 4.45615E-03 3.46661E-03 6.89020E-02 -9.37668E-04 1.64788E-03
A12＝ -1.80316E-01 -1.48374E-02 -1.68168E-04 -2.21901E-04
A14＝ 4.37798E-02 8.72278E-04 1.06644E-05 1.26521E-05
Referring to table one and Figure 1B, in the image pickup optical system of present embodiment, the focal distance f of image pickup optical system=3.91 (millimeter), the f-number of the integral body of formation (f-number) Fno=2.80, half HFOV=35.5 at maximum field visual angle °; Each optical data of present embodiment can satisfy the correlationship formula after calculate deriving, like following table three, related symbol as previously mentioned, this repeats no more:
Table three, present embodiment satisfy the data of correlationship formula
Figure BSA00000603761500121
Can know by the optical data of table one and by the aberration curve figure of Figure 1B; By the present embodiment of image pickup optical system of the present invention, with distortion (distortion) good compensation effect is arranged for spherical aberration (longitudinal spherical aberration), astigmatism (astigmatic field curving).
< second embodiment >
The image pickup optical system synoptic diagram of second embodiment of the invention sees also Fig. 2 A, and the aberration curve of second embodiment sees also Fig. 2 B.The image pickup optical system that the image pickup optical system of second embodiment mainly is made up of six-element lens, aperture 200 and infrared ray filtering optical filter 270; On optical axis; Extremely comprise in regular turn by the thing side: first lens 210 with positive refracting power as side; Made for plastic material, its thing side optical surface 211 is a convex surface, it is convex surface as side optical surface 212, its thing side optical surface 211 and be all aspheric surface as side optical surface 212; Aperture 200; Second lens 220 with negative refracting power, made for plastic material, its thing side optical surface 221 is a concave surface, it is concave surface as side optical surface 222, its thing side optical surface 221 and be all aspheric surface as side optical surface 222; The 3rd lens 230 with positive refracting power, made for plastic material, its thing side optical surface 231 is a convex surface, it is concave surface as side optical surface 232, its thing side optical surface 231 be all aspheric surface as side optical surface 232; The 4th lens 240 with positive refracting power, made for plastic material, its thing side optical surface 241 is a concave surface, it is convex surface as side optical surface 242, its thing side optical surface 241 be all aspheric surface as side optical surface 242; The 5th lens 250 with positive refracting power, made for plastic material, its thing side optical surface 251 is a concave surface, it is convex surface as side optical surface 252, its thing side optical surface 251 be all aspheric surface as side optical surface 252; The 6th lens 260 with negative refracting power; For plastic material made; Its thing side optical surface 261 is a concave surface, it is concave surface as side optical surface 262, its thing side optical surface 261 be all aspheric surface as side optical surface 262, and it is provided with at least one point of inflexion as side optical surface 262; Infrared ray filtering optical filter (IR-filter) that glass material is processed 270 is sheet glass, in order to Tong Guo the wavelength section of the light that is adjusted to picture; And be arranged at the image sensing component 290 on the imaging surface 280; Via the combination of six-element lens, aperture 200 and infrared ray filtering optical filter 270, can object be formed images on image sensing component 290.
The optical data of table four, present embodiment
The optical data of present embodiment is as above shown in the table four, wherein, the thing side optical surface of first lens, 210 to the 6th lens 260 with all use the aspheric surface equation of formula (15) to constitute as the side optical surface, its asphericity coefficient is shown in following table five:
The asphericity coefficient of table five, present embodiment
Figure BSA00000603761500141
Referring to table four and Fig. 2 B, in the image pickup optical system of present embodiment, the focal distance f of image pickup optical system=4.25 (millimeter), the f-number of the integral body of formation (f-number) Fno=2.80, half HFOV=33.5 at maximum field visual angle °; Each optical data of present embodiment can satisfy the correlationship formula after calculate deriving, like following table six, related symbol as previously mentioned, this repeats no more:
Table six, present embodiment satisfy the data of correlationship formula
Figure BSA00000603761500142
Can know, good compensation effect is arranged by the optical data of table four and by the aberration curve figure of Fig. 2 B for spherical aberration, astigmatism and distortion by the present embodiment of image pickup optical system of the present invention.
< the 3rd embodiment >
The image pickup optical system synoptic diagram of third embodiment of the invention sees also Fig. 3 A, and the aberration curve of the 3rd embodiment sees also Fig. 3 B.The image pickup optical system of the 3rd embodiment mainly is made up of six-element lens, aperture 300 and 370 of infrared ray filtering optical filters; On optical axis, extremely comprise in regular turn by the thing side: aperture 300 as side; First lens 310 with positive refracting power, made for plastic material, its thing side optical surface 311 is a convex surface, it is concave surface as side optical surface 312, its thing side optical surface 311 and be all aspheric surface as side optical surface 312; Second lens 320 with negative refracting power, made for plastic material, its thing side optical surface 321 is a convex surface, it is concave surface as side optical surface 322, its thing side optical surface 321 and be all aspheric surface as side optical surface 322; The 3rd lens 330 with negative refracting power, made for plastic material, its thing side optical surface 331 is a concave surface, it is convex surface as side optical surface 332, its thing side optical surface 331 be all aspheric surface as side optical surface 332; The 4th lens 340 with positive refracting power, made for plastic material, its thing side optical surface 341 is a concave surface, it is convex surface as side optical surface 342, its thing side optical surface 341 be all aspheric surface as side optical surface 342; The 5th lens 350 with positive refracting power, made for plastic material, its thing side optical surface 351 is a concave surface, it is convex surface as side optical surface 352, its thing side optical surface 351 be all aspheric surface as side optical surface 352; The 6th lens 360 with negative refracting power; For plastic material made; Its thing side optical surface 361 is a convex surface, it is concave surface as side optical surface 362, its thing side optical surface 361 be all aspheric surface as side optical surface 362, and it is provided with at least one point of inflexion as side optical surface 362; Infrared ray filtering optical filter (IR-filter) that glass material is processed 370 is sheet glass, in order to Tong Guo the wavelength section of the light that is adjusted to picture; And be arranged at the image sensing component 390 on the imaging surface 380; Via the combination of six-element lens, aperture 300 and infrared ray filtering optical filter 370, object is formed images on image sensing component 390.
The optical data of table seven, present embodiment
Figure BSA00000603761500151
The optical data of present embodiment is as above shown in the table seven, wherein, the thing side optical surface of first lens, 310 to the 6th lens 360 with all use the aspheric surface equation of formula (15) to constitute as the side optical surface, its asphericity coefficient is shown in following table eight:
The asphericity coefficient of table eight, present embodiment
Figure BSA00000603761500162
Referring to table seven and Fig. 3 B, in the image pickup optical system of present embodiment, the focal distance f of image pickup optical system=3.88 (millimeter), the f-number of the integral body of formation (f-number) Fno=2.80, half HFOV=35.6 at maximum field visual angle °; Each optical data of present embodiment can satisfy the correlationship formula after calculate deriving, like following table nine, related symbol as previously mentioned, this repeats no more:
Table nine, present embodiment satisfy the data of correlationship formula
Figure BSA00000603761500163
Figure BSA00000603761500171
Can know, good compensation effect is arranged by the optical data of table seven and by the aberration curve figure of Fig. 3 B for spherical aberration, astigmatism and distortion by the present embodiment of image pickup optical system of the present invention.
< the 4th embodiment >
The image pickup optical system synoptic diagram of fourth embodiment of the invention sees also Fig. 4 A, and the aberration curve of the 4th embodiment sees also Fig. 4 B.The image pickup optical system of the 4th embodiment mainly is made up of six-element lens, aperture 400 and 470 of infrared ray filtering optical filters; On optical axis; Extremely comprise in regular turn by the thing side: first lens 410 with positive refracting power as side; Made for plastic material, its thing side optical surface 411 is a convex surface, it is concave surface as side optical surface 412, its thing side optical surface 411 and be all aspheric surface as side optical surface 412; Aperture 400; Second lens 420 with negative refracting power, made for plastic material, its thing side optical surface 421 is a concave surface, it is concave surface as side optical surface 422, its thing side optical surface 421 and be all aspheric surface as side optical surface 422; The 3rd lens 430 with negative refracting power, made for plastic material, its thing side optical surface 431 is a concave surface, it is concave surface as side optical surface 432, its thing side optical surface 431 be all aspheric surface as side optical surface 432; The 4th lens 440 with positive refracting power, made for plastic material, its thing side optical surface 441 is a concave surface, it is convex surface as side optical surface 442, its thing side optical surface 441 be all aspheric surface as side optical surface 442; The 5th lens 450 with positive refracting power, made for plastic material, its thing side optical surface 451 is a convex surface, it is convex surface as side optical surface 452, its thing side optical surface 451 be all aspheric surface as side optical surface 452; The 6th lens 460 with negative refracting power; For plastic material made; Its thing side optical surface 461 is a concave surface, it is concave surface as side optical surface 462, its thing side optical surface 461 be all aspheric surface as side optical surface 462, and it is provided with at least one point of inflexion as side optical surface 462; Infrared ray filtering optical filter (IR-filter) that glass material is processed 470 is sheet glass, in order to Tong Guo the wavelength section of the light that is adjusted to picture; And be arranged at the image sensing component 490 on the imaging surface 480; Via the combination of six-element lens, aperture 400 and infrared ray filtering optical filter 470, object is formed images on image sensing component 490.
The optical data of table ten, present embodiment
Figure BSA00000603761500181
The optical data of present embodiment is as above shown in the table ten, wherein, the thing side optical surface of first lens, 410 to the 6th lens 460 with all use the aspheric surface equation of formula (15) to constitute as the side optical surface, its asphericity coefficient is shown in following table 11:
The asphericity coefficient of table ten one, present embodiment
Figure BSA00000603761500182
Referring to table ten and Fig. 4 B, in the image pickup optical system of present embodiment, the focal distance f of image pickup optical system=4.22 (millimeter), the f-number of the integral body of formation (f-number) Fno=2.80, half HFOV=33.5 at maximum field visual angle °; Each optical data of present embodiment can satisfy the correlationship formula after calculating derivation, like following table 12, related symbol repeats no more at this as previously mentioned:
Table ten two, present embodiment satisfy the data of correlationship formula
Figure BSA00000603761500192
Can know, good compensation effect is arranged by the optical data of table ten and by the aberration curve figure of Fig. 4 B for spherical aberration, astigmatism and distortion by the present embodiment of image pickup optical system of the present invention.
< the 5th embodiment >
The image pickup optical system synoptic diagram of fifth embodiment of the invention sees also Fig. 5 A, and the aberration curve of the 5th embodiment sees also Fig. 5 B.The image pickup optical system of the 5th embodiment mainly is made up of six-element lens, aperture 500 and 570 of infrared ray filtering optical filters; On optical axis, extremely comprise in regular turn by the thing side: aperture 500 as side; First lens 510 with positive refracting power, made for plastic material, its thing side optical surface 511 is a convex surface, it is convex surface as side optical surface 512, its thing side optical surface 511 and be all aspheric surface as side optical surface 512; Second lens 520 with negative refracting power, made for plastic material, its thing side optical surface 521 is a concave surface, it is concave surface as side optical surface 522, its thing side optical surface 521 and be all aspheric surface as side optical surface 522; The 3rd lens 530 with positive refracting power, made for plastic material, its thing side optical surface 531 is a convex surface, it is convex surface as side optical surface 532, its thing side optical surface 531 be all aspheric surface as side optical surface 532; The 4th lens 540 with positive refracting power, made for plastic material, its thing side optical surface 541 is a concave surface, it is convex surface as side optical surface 542, its thing side optical surface 541 be all aspheric surface as side optical surface 542; The 5th lens 550 with positive refracting power, made for plastic material, its thing side optical surface 551 is a convex surface, it is convex surface as side optical surface 552, its thing side optical surface 551 be all aspheric surface as side optical surface 552; The 6th lens 560 with negative refracting power; For plastic material made; Its thing side optical surface 561 is a concave surface, it is concave surface as side optical surface 562, its thing side optical surface 561 be all aspheric surface as side optical surface 562, and it is provided with at least one point of inflexion as side optical surface 562; Infrared ray filtering optical filter (IR-filter) that glass material is processed 570 is sheet glass, in order to Tong Guo the wavelength section of the light that is adjusted to picture; And be arranged at the image sensing component 590 on the imaging surface 580; Via the combination of six-element lens, aperture 500 and infrared ray filtering optical filter 570, object is formed images on image sensing component 590.
The optical data of table ten three, present embodiment
Figure BSA00000603761500201
The optical data of present embodiment is as above shown in the table ten three, wherein, the thing side optical surface of first lens, 510 to the 6th lens 560 with all use the aspheric surface equation of formula (15) to constitute as the side optical surface, its asphericity coefficient is shown in following table 14:
The asphericity coefficient of table ten four, present embodiment
Figure BSA00000603761500202
Figure BSA00000603761500211
Referring to table ten three and Fig. 5 B; In the image pickup optical system of present embodiment; The focal distance f of image pickup optical system=4.80 (millimeter), f-number (f-number) Fno=2.80 of the overall image pickup optical system of formation, half HFOV=30.5 at maximum field visual angle °; Each optical data of present embodiment can satisfy the correlationship formula after calculating derivation, like following table 15, related symbol repeats no more at this as previously mentioned:
Table ten five, present embodiment satisfy the data of correlationship formula
Figure BSA00000603761500212
Can know, good compensation effect is arranged by the optical data of table ten three and by the aberration curve figure of Fig. 5 B for spherical aberration, astigmatism and distortion by the present embodiment of image pickup optical system of the present invention.
< the 6th embodiment >
The image pickup optical system synoptic diagram of sixth embodiment of the invention sees also Fig. 6 A, and the aberration curve of the 6th embodiment sees also Fig. 6 B.The image pickup optical system of the 6th embodiment mainly is made up of six-element lens, aperture 600 and 670 of infrared ray filtering optical filters; On optical axis, extremely comprise in regular turn by the thing side: aperture 600 as side; First lens 610 with positive refracting power, made for plastic material, its thing side optical surface 611 is a convex surface, it is convex surface as side optical surface 612, its thing side optical surface 611 and be all aspheric surface as side optical surface 612; Second lens 620 with negative refracting power, made for plastic material, its thing side optical surface 621 is a concave surface, it is concave surface as side optical surface 622, its thing side optical surface 621 and be all aspheric surface as side optical surface 622; The 3rd lens 630 with positive refracting power, made for plastic material, its thing side optical surface 631 is a concave surface, it is convex surface as side optical surface 632, its thing side optical surface 631 be all aspheric surface as side optical surface 632; The 4th lens 640 with positive refracting power, made for plastic material, its thing side optical surface 641 is a concave surface, it is convex surface as side optical surface 642, its thing side optical surface 641 be all aspheric surface as side optical surface 642; The 5th lens 650 with negative refracting power, made for plastic material, its thing side optical surface 651 is a convex surface, it is concave surface as side optical surface 652, its thing side optical surface 651 be all aspheric surface as side optical surface 652; The 6th lens 660 with negative refracting power; For plastic material made; Its thing side optical surface 661 is a concave surface, it is concave surface as side optical surface 662, its thing side optical surface 661 be all aspheric surface as side optical surface 662, and it is provided with at least one point of inflexion as side optical surface 662; Infrared ray filtering optical filter (IR-filter) that glass material is processed 670 is sheet glass, in order to Tong Guo the wavelength section of the light that is adjusted to picture; And be arranged at the image sensing component 690 on the imaging surface 680; Via the combination of six-element lens, aperture 600 and infrared ray filtering optical filter 670, object is formed images on image sensing component 690.
The optical data of table ten six, present embodiment
Figure BSA00000603761500221
Figure BSA00000603761500231
The optical data of present embodiment is as above shown in the table ten six, wherein, the thing side optical surface of first lens, 610 to the 6th lens 660 with all use the aspheric surface equation of formula (15) to constitute as the side optical surface, its asphericity coefficient is shown in following table 17:
The asphericity coefficient of table ten seven, present embodiment
Figure BSA00000603761500232
Referring to table ten six and Fig. 6 B; In the image pickup optical system of present embodiment; The focal distance f of image pickup optical system=5.23 (millimeter), f-number (f-number) Fno=3.20 of the overall image pickup optical system of formation, half HFOV=33.3 at maximum field visual angle °; Each optical data of present embodiment can satisfy the correlationship formula after calculate deriving, like following table 18, related symbol as previously mentioned, this repeats no more:
Table ten eight, present embodiment satisfy the data of correlationship formula
Figure BSA00000603761500233
Can know, good compensation effect is arranged by the optical data of table ten six and by the aberration curve figure of Fig. 6 B for spherical aberration, astigmatism and distortion by the present embodiment of image pickup optical system of the present invention.
In the image pickup optical system of the present invention,, represent that this lens surface is a convex surface in paraxial place if lens surface is a convex surface; If lens surface is a concave surface, represent that this lens surface is a concave surface in paraxial place.
In the image pickup optical system of the present invention, can be provided with at least one aperture diaphragm,,, help to promote the quality of image to reduce parasitic light like credit light diaphragm (Glare Stop) or field stop (Field Stop) etc.
Table one to table ten eight is depicted as the different numerical value change tables of image pickup optical system embodiment of the present invention; Yet the numerical value change of each embodiment of the present invention is accessory body experiment gained all; Even use different numerical value; The product of same structure must belong to protection category of the present invention, thus above explanation describe and graphic in illustrated only as exemplary, non-in order to limit claim of the present invention.

Claims (23)

1. an image pickup optical system is characterized in that, said image pickup optical system is arranged along optical axis to comprising successively as side by the thing side:
First lens with positive refracting power, its thing side optical surface is a convex surface;
Second lens with refracting power;
The 3rd lens with refracting power;
The 4th lens with refracting power;
The 5th lens with refracting power; And
Have the 6th lens of refracting power, made by plastic material, the 6th lens be concave surface as the side optical surface, its thing side optical surface be all aspheric surface as the side optical surface, and it is provided with at least one point of inflexion as the side optical surface;
Wherein, the focal length of said image pickup optical system is f, and the focal length of said the 5th lens is f 5, the focal length of said the 6th lens is f 6, satisfy the following relationship formula:
1.8＜|f/f 5|+|f/f 6|＜3.5。
2. image pickup optical system as claimed in claim 1 is characterized in that, said the 6th lens have negative refracting power.
3. image pickup optical system as claimed in claim 2 is characterized in that, said second lens have negative refracting power.
4. image pickup optical system as claimed in claim 3 is characterized in that, said the 5th lens have positive refracting power.
5. image pickup optical system as claimed in claim 4 is characterized in that, also comprises aperture; The thing side optical surface of said first lens to said the 6th lens be T as the distance of side optical surface on optical axis D, said aperture to said the 6th lens be S as the distance of side optical surface on optical axis D, satisfy the following relationship formula:
0.7＜S D/T D＜1.2。
6. image pickup optical system as claimed in claim 5 is characterized in that, the focal length of said image pickup optical system is f, and the thickness of said the 3rd lens on optical axis is CT 3, the thickness of said the 4th lens on optical axis is CT 4, the thickness of said the 5th lens on optical axis is CT 5, satisfy the following relationship formula:
0.2＜(CT 3+CT 4+CT 5)/f＜0.4。
7. image pickup optical system as claimed in claim 5 is characterized in that, comprises at least three plastic lenss in the said image pickup optical system; Also image sensing component is set, forms images for object at the imaging surface place; The thing side optical surface of said first lens to the distance of said imaging surface on optical axis is TTL, and the half the of the effective sensing region of said image sensing component diagonal angle line length is ImgH, satisfies the following relationship formula:
TTL/ImgH＜2.1。
8. image pickup optical system as claimed in claim 5 is characterized in that, the thing side optical surface of said the 4th lens is R in the radius-of-curvature on paraxial 7, said the 4th lens be R as the side optical surface in the radius-of-curvature on paraxial 8, satisfy the following relationship formula:
0＜(R 7-R 8)/(R 7+R 8)＜0.6。
9. image pickup optical system as claimed in claim 5 is characterized in that, the thing side optical surface of said second lens is R in the radius-of-curvature on paraxial 3, said second lens be R as the side optical surface in the radius-of-curvature on paraxial 4, satisfy the following relationship formula:
0＜(R 3+R 4)/(R 3-R 4)＜1.5。
10. image pickup optical system as claimed in claim 5 is characterized in that, said second lens be concave surface as the side optical surface; The thing side optical surface of said the 6th lens is a concave surface; The focal length of said image pickup optical system is f, and the focal length of said the 5th lens is f 5, the focal length of said the 6th lens is f 6, further satisfy the following relationship formula:
2.0＜|f/f 5|+|f/f 6|＜3.2。
11. image pickup optical system as claimed in claim 3 is characterized in that, the focal length of said image pickup optical system is f, and the focal length of said first lens is f 1, satisfy the following relationship formula:
1.0＜f/f 1＜2.0。
12. image pickup optical system as claimed in claim 11 is characterized in that, the abbe number of said first lens is v 1, the abbe number of said second lens is v 2, satisfy the following relationship formula:
25＜v 1-v 2＜40。
13. image pickup optical system as claimed in claim 12 is characterized in that, the picture side optical surface concave surface of said second lens; The thing side optical surface of said the 4th lens is concave surface, be convex surface as the side optical surface; The thing side optical surface of said the 5th lens is concave surface, be convex surface as the side optical surface; The thing side optical surface of said the 6th lens is a concave surface.
14. image pickup optical system as claimed in claim 12 is characterized in that, the thing side optical surface of said the 6th lens is R in the radius-of-curvature on paraxial 11, said the 6th lens be R as the side optical surface in the radius-of-curvature on paraxial 12, satisfy the following relationship formula:
-0.2＜(R 11+R 12)/(R 11-R 12)＜0.9。
15. image pickup optical system as claimed in claim 12 also comprises imaging surface; It is characterized in that the thing side optical surface of said first lens to the distance of said imaging surface on optical axis is TTL, satisfies the following relationship formula:
3.7mm＜TTL＜6.5mm。
16. image pickup optical system as claimed in claim 4 is characterized in that Y CBe the point of contact that is described below and the vertical range of optical axis; Said point of contact is the point of contact of the tangent line on the picture side optical surface of the 6th lens, and said tangent line is perpendicular to optical axis, and said point of contact is not positioned on the optical axis; The focal length of said image pickup optical system is f, satisfies the following relationship formula:
0.1＜Y C/f＜0.8。
17. image pickup optical system as claimed in claim 16 is characterized in that, said the 6th lens be R as the side optical surface in the radius-of-curvature on paraxial 12, the focal length of said image pickup optical system is f, satisfies the following relationship formula:
0.2＜R 12/f＜1.2。
18. image pickup optical system as claimed in claim 16 is characterized in that, said second lens be concave surface as the side optical surface; The thing side optical surface of said the 6th lens is a concave surface.
19. image pickup optical system as claimed in claim 16 is characterized in that, the distance of thing side optical surface on optical axis as side optical surface to said second lens of said first lens is T 12, the distance of thing side optical surface on optical axis as side optical surface to said the 3rd lens of said second lens is T 23, satisfy the following relationship formula:
0.03＜T 12/T 23＜0.3。
20. image pickup optical system as claimed in claim 2 is characterized in that, also at the imaging surface place image sensing component is set, and forms images for object; The thing side optical surface of said first lens to the distance of said imaging surface on optical axis is TTL, and the half the of the diagonal angle line length of effective sensing region of said image sensing component is ImgH, satisfies the following relationship formula:
TTL/ImgH＜2.1。
21. an image pickup optical system is characterized in that, it is arranged along optical axis to comprising successively as side by the thing side:
First lens with positive refracting power, its thing side optical surface is a convex surface;
Second lens with refracting power;
The 3rd lens with refracting power;
The 4th lens with refracting power;
The 5th lens with refracting power; And
Have the 6th lens of refracting power, made by plastic material, the 6th lens be concave surface as the side optical surface, its thing side optical surface be all aspheric surface as the side optical surface, and it is provided with at least one point of inflexion as the side optical surface;
Wherein, the focal length of said image pickup optical system is f, and the focal length of said the 5th lens is f 5, the focal length of said the 6th lens is f 6, Y CBe the point of contact that is described below and the vertical range of optical axis, said point of contact is the point of contact of the tangent line on the picture side optical surface of said the 6th lens, and said tangent line is perpendicular to optical axis, and said point of contact is not positioned on the optical axis, satisfies the following relationship formula:
1.8＜|f/f 5|+|f/f 6|＜3.5
0.1＜Y C/f＜0.8。
22. image pickup optical system as claimed in claim 21 also comprises imaging surface; It is characterized in that the thing side optical surface of said first lens to the distance of said imaging surface on optical axis is TTL, satisfies the following relationship formula:
3.7mm＜TTL＜6.5mm。
23. image pickup optical system as claimed in claim 21 is characterized in that, said second lens be concave surface as the side optical surface; The thing side optical surface of said the 4th lens is concave surface, be convex surface as the side optical surface; The thing side optical surface of said the 5th lens is concave surface, be convex surface as the side optical surface; The thing side optical surface of said the 6th lens is a concave surface.
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US20170371134A1 (en) 2017-12-28
US10209490B2 (en) 2019-02-19
US9519122B2 (en) 2016-12-13
US11726302B2 (en) 2023-08-15
CN104111516B (en) 2016-08-31
CN104076487B (en) 2017-01-18
US10942339B2 (en) 2021-03-09
CN104101984B (en) 2016-08-17
TWI435138B (en) 2014-04-21
TW201300871A (en) 2013-01-01
US9013808B2 (en) 2015-04-21
US20140111873A1 (en) 2014-04-24
US20150331225A1 (en) 2015-11-19
US20190196153A1 (en) 2019-06-27
US8830595B2 (en) 2014-09-09
US9690076B2 (en) 2017-06-27
US9110279B2 (en) 2015-08-18
US20160178872A1 (en) 2016-06-23
US20160178873A1 (en) 2016-06-23
CN104076487A (en) 2014-10-01
US9606331B2 (en) 2017-03-28

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